CN111913103B - Fault detection method for spring energy storage operating structure circuit breaker - Google Patents
Fault detection method for spring energy storage operating structure circuit breaker Download PDFInfo
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- CN111913103B CN111913103B CN202010784630.8A CN202010784630A CN111913103B CN 111913103 B CN111913103 B CN 111913103B CN 202010784630 A CN202010784630 A CN 202010784630A CN 111913103 B CN111913103 B CN 111913103B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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Abstract
The invention relates to a fault detection method for a breaker of a spring energy storage operating structure, which comprises the following steps of: s1, acquiring current waveform signals of a circuit breaker energy storage motor of a spring energy storage operating structure under different conditions; s2, constructing a fault detection model of the breaker of the spring energy storage operating structure according to the obtained motor current waveform signal; and S3, inputting current waveform signals of the energy storage motor of the spring energy storage operating structure circuit breaker to be evaluated into a fault detection model of the spring energy storage operating structure circuit breaker, and evaluating to obtain a fault state. The invention can reliably and effectively detect the fault of the spring energy storage operating structure breaker.
Description
Technical Field
The invention belongs to the field of fault detection of a spring energy storage operating structure circuit breaker, and particularly relates to a fault detection method of the spring energy storage operating structure circuit breaker.
Background
With the acceleration of the modern industrialization process, the reliability of the power grid is an important guarantee for the stable development of national production and national economy in China. Under the background of the times, china continuously promotes the upgrading and perfection of power systems, and actively develops a series of work of power safety and reliability. The spring energy storage operating structure circuit breaker is one of key equipment in a power system and mainly plays important roles in two aspects of protection and control. The device can not only cut off or close the no-load current and the load current in the high-voltage circuit, but also protect the power device when the system has faults.
When the breaker of the spring energy storage operating structure breaks down, the circuit equipment can be damaged, power failure and economic loss in a certain range are caused, and even accidents such as casualties and the like caused by fire disasters can be caused. The high-voltage circuit breaker is subjected to fault diagnosis regularly, and the operation state of the high-voltage circuit breaker is mastered, so that the method is not only key for ensuring stable operation of a power system and preventing accidents, but also an important mode for improving the quality of a power grid in China and ensuring the life safety of people. Therefore, a reliable and effective fault detection method for the breaker with the spring energy storage operating structure is urgently needed.
Disclosure of Invention
In view of this, the present invention provides a method for detecting a fault of a circuit breaker with a spring energy storage operating structure, which can reliably and effectively detect a fault of the circuit breaker with the spring energy storage operating structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fault detection method for a spring energy storage operating structure breaker comprises the following steps:
s1, acquiring current waveform signals of a circuit breaker energy storage motor of a spring energy storage operating structure under different conditions;
s2, constructing a fault detection model of the breaker of the spring energy storage operating structure according to the obtained motor current waveform signal;
and S3, inputting current waveform signals of the energy storage motor of the spring energy storage operating structure circuit breaker to be evaluated into a fault detection model of the spring energy storage operating structure circuit breaker, and evaluating to obtain a fault state.
Further, the different conditions comprise a no-fault state and a to-be-evaluated state.
Further, the step S1 specifically includes:
step S11, installing a No. 1 interface, a No. 2 interface, a No. 1 probe wiring, a No. 2 probe wiring and a signal detection oscilloscope outside the energy storage motor of the spring energy storage operation structure circuit breaker, wherein the No. 1 interface is connected with the signal detection oscilloscope through the No. 1 probe wiring, the No. 2 interface is connected with the signal detection oscilloscope through the No. 2 probe wiring, and the signal detection oscilloscope obtains a current waveform signal of the energy storage motor of the spring energy storage operation structure circuit breaker through the No. 1 probe wiring and the No. 2 probe wiring;
and S12, connecting to obtain two current waveform signals of the energy storage motor in different states through the step S11, and sequentially extracting the two current waveform signals to obtain current waveform signals of the energy storage motor of the circuit breaker of the spring energy storage operation structure under different conditions.
Further, the step S12 specifically includes:
(1) Selecting a breaker of a spring energy storage operation structure in a fault-free state as a reference breaker at t 0 ～t 99 Selecting 100 equidistant test points in the time period, and recording the jth test time point as t j And are sequentially denoted as t 0 ,t 1 ,t 2 ,…，t 48 ,t 49 ,t 50 …t 97 ,t 98 ,t 99 Measuring the current value on the jth test point and recording the current value as i 0j In turn mark as i 00 ,i 01 ,i 02 ,…,i 048 ,i 049 ,i 050 ,…,i 097 ,i 098 ,i 099 Obtain 100 groups (t) j ,i 0j ) Data, where t j Is [ t 0 ,t 99 ]Equidistant test points in a time interval, j ∈ [0,99]]An integer of (d);
(2) Selecting the breaker of the spring energy storage operation structure in the evaluation state to be tested as the breaker to be tested, and performing the test at t 0 ～t 99 Selecting 100 equidistant test points in the time period, and recording the jth test time point as t j And are sequentially denoted as t 0 ,t 1 ,t 2 …t 48 ,t 49 ,t 50 …t 97 ,t 98 ,t 99 Measured at jth test pointThe value of the current is recorded as i 1j In turn mark as i 10 ,i 11 ,i 12 ,…,i 148 ,i 149 ,i 150 …i 197 ,i 198 ,i 199 Obtain 100 groups (t) j ,i 1j ) Data, wherein t j Is [ t 0 ,t 99 ]Equidistant test points in a time interval, j ∈ [0,99]]Is an integer of (2).
Further, the step S2 specifically includes:
s21, fitting data obtained by the breaker of the spring energy storage operating structure in the fault-free state by using a Newton interpolation method to obtain a mathematical model Y related to time t 0 (t) the following:
Y 0 (t)＝α 0 +α 1 (t-t 0 )+α 2 (t-t 0 )(t-t 1 )+α 3 (t-t 0 )(t-t 1 )(t-t 2 )+…+α j (t-t 0 )(t-t 1 )…(t-t j-1 )
in the formula t j At the time point of the jth test, α j Are respectively a mathematical model Y 0 (t) the jth coefficient, wherein:
α 0 ＝i 00 ,
…
i 0 [t 0 ,t 1 ,t 2 ,…,t j-2 ,t j-1 ,t j ]represents i 00 ,i 01 ,i 02 ,…,i 0j-2 ,i 0j-1 ,i 0j Is given by a differential correlation coefficient of (1), j ∈ [0,99]]An integer of (d);
s22, fitting data obtained by the breaker of the spring energy storage operating structure in the state to be evaluated by utilizing a Newton interpolation method to obtain a mathematical model Y related to time t 1 (t) the following:
Y 1 (t)＝β 0 +β 1 (t-t 0 )+β 2 (t-t 0 )(t-t 1 )+β 3 (t-t 0 )(t-t 1 )(t-t 2 )+…+β j (t-t 0 )(t-t 1 )…(t-t j-1 )
in the formula t j At the time point of the jth test, α j Are respectively a mathematical model Y 0 (t) the jth coefficient, wherein:
β 0 ＝i 10 ,
…
i 1 [t 0 ,t 1 ,t 2 ,…,t j-2 ,t j-1 ,t j ]represents i 10 ,i 11 ,i 12 ,…,i 1j-2 ,i 1j-1 ,i 1j Is given by a differential correlation coefficient of (1), j ∈ [0,99]]An integer of (d);
step S23, according to the step S21 and the step S22, respectively, obtaining:
mathematical model Y for current waveform signal data of energy storage motor of non-fault state spring energy storage operating structure breaker 0 Correlation coefficient of (t):
α 0 ,α 1 ,α 2 ,…,α j-2 ,α j-1 ,α j
wherein alpha is j Are respectively a mathematical model Y 0 (t) the jth coefficient, j ∈ [0,99]]An integer of (d);
mathematical model Y for current waveform signal data of energy storage motor of spring energy storage operating structure breaker in state to be evaluated 1 Correlation coefficient of (t):
β 0 ,β 1 ,β 2 ,…,β j-2 ,β j-1 ,β j
wherein beta is j Are respectively a mathematical model Y 0 (t) the jth coefficient, j ∈ [0,99]]An integer of (a);
fault detection model for establishing spring energy storage operating structure breaker
Wherein the content of the first and second substances,
Further, the step S3 specifically includes: according to the fault detection model M of the spring energy storage operating structure breaker obtained in the step S2
When M is more than 0.9 and less than or equal to 1, the breaker of the spring energy storage operating structure in the state to be evaluated is in a fault-free state;
when M is more than 0.8 and less than or equal to 0.9, the breaker of the spring energy storage operating structure in the state to be evaluated is in a slight fault state;
when M is more than 0.6 and less than or equal to 0.8, the breaker of the spring energy storage operating structure in the evaluation state to be tested is in a medium fault state;
and when the M is less than or equal to 0.6, the breaker of the spring energy storage operating structure in the state to be evaluated is in a serious fault state.
Compared with the prior art, the invention has the following beneficial effects:
the invention can reliably and effectively detect the fault of the spring energy storage operating structure breaker.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
fig. 2 is a schematic circuit diagram for acquiring a current waveform signal of an energy storage motor of a breaker with a spring energy storage operating structure according to an embodiment of the present invention;
fig. 3 is a current waveform signal of the energy storage motor of the breaker with the spring energy storage operating structure according to an embodiment of the invention;
in the figure: the circuit breaker comprises a 1-signal detection oscilloscope, a 2-1 probe wiring, a 3-2 probe wiring, a 4-1 interface, a 5-spring energy storage operating structure circuit breaker energy storage motor and a 6-2 interface.
Detailed Description
The invention is further explained by the following embodiments in conjunction with the drawings.
Referring to fig. 1, the present invention provides a method for detecting a fault of a circuit breaker with a spring energy storage operating structure, comprising the following steps:
s1, acquiring current waveform signals of a spring energy storage operating structure breaker energy storage motor in a no-fault state and a to-be-evaluated state;
referring to fig. 2, in this embodiment, the step S1 specifically includes:
step S11: the circuit breaker energy storage motor with the spring energy storage operation structure is characterized in that a No. 1 interface, a No. 2 interface, a No. 1 probe wiring, a No. 2 probe wiring and a signal detection oscilloscope are installed on the outer side of the circuit breaker energy storage motor with the spring energy storage operation structure, the No. 1 interface is connected with the signal detection oscilloscope through the No. 1 probe wiring, the No. 2 interface is connected with the signal detection oscilloscope through the No. 2 probe wiring, and the signal detection oscilloscope obtains a current waveform signal of the circuit breaker energy storage motor with the spring energy storage operation structure through the No. 1 probe wiring and the No. 2 probe wiring;
and S12, connecting and acquiring current waveform signals of the energy storage motor in two different states through the step S11, and sequentially extracting the two current waveform signals to obtain current waveform signals of the energy storage motor of the circuit breaker of the spring energy storage operation structure under different conditions.
In this embodiment, preferably, the step S12 is specifically:
(1) Selecting a circuit breaker of the spring energy storage operating structure in a fault-free state as a reference circuit breaker, and performing a test at t 0 ～t 99 Selecting 100 equidistant test points in the time period, and recording the jth test time point as t j And are sequentially denoted as t 0 ,t 1 ,t 2 ,…，t 48 ,t 49 ,t 50 …t 97 ,t 98 ,t 99 Measuring the current value on the jth test point and recording the current value as i 0j In turn denoted as i 00 ,i 01 ,i 02 ,…,i 048 ,i 049 ,i 050 ,…,i 097 ,i 098 ,i 099 Obtain 100 groups (t) j ,i 0j ) Data, wherein t j Is [ t ] 0 ,t 99 ]Equidistant test points in a time interval, j ∈ [0,99]]An integer of (a);
(2) Selecting the breaker of the spring energy storage operating structure in the evaluation state to be tested as the breaker to be tested at t 0 ～t 99 Selecting 100 equidistant test points in the time period, and recording the jth test time point as t j And are sequentially denoted as t 0 ,t 1 ,t 2 …t 48 ,t 49 ,t 50 …t 97 ,t 98 ,t 99 Measuring the current value on the jth test point and recording the current value as i 1j In turn denoted as i 10 ,i 11 ,i 12 ,…,i 148 ,i 149 ,i 150 …i 197 ,i 198 ,i 199 Obtain 100 groups (t) j ,i 1j ) Data, wherein t j Is [ t 0 ,t 99 ]Equidistant test points in a time interval, j is E [0,99]]Is an integer of (1).
S2, constructing a fault detection model of the breaker of the spring energy storage operating structure according to the obtained motor current waveform signal;
in this embodiment, preferably, the step S2 specifically includes:
s21, fitting data obtained by the breaker of the spring energy storage operating structure in the fault-free state by using a Newton interpolation method to obtain a mathematical model Y related to time t 0 (t) the following:
Y 0 (t)＝α 0 +α 1 (t-t 0 )+α 2 (t-t 0 )(t-t 1 )+α 3 (t-t 0 )(t-t 1 )(t-t 2 )+…+α j (t-t 0 )(t-t 1 )…(t-t j-1 )
in the formula t j At the time point of the jth test, α j Are respectively a mathematical model Y 0 (t) the jth coefficient, wherein:
α 0 ＝i 00 ,
…
i 0 [t 0 ,t 1 ,t 2 ,…,t j-2 ,t j-1 ,t j ]represents i 00 ,i 01 ,i 02 ,…,i 0j-2 ,i 0j-1 ,i 0j Is given by a differential correlation coefficient of (1), j ∈ [0,99]]An integer of (d);
s22, fitting data obtained by the breaker of the spring energy storage operating structure in the state to be evaluated by utilizing a Newton interpolation method to obtain a mathematical model Y related to time t 1 (t) the following:
Y 1 (t)＝β 0 +β 1 (t-t 0 )+β 2 (t-t 0 )(t-t 1 )+β 3 (t-t 0 )(t-t 1 )(t-t 2 )+…+β j (t-t 0 )(t-t 1 )…(t-t j-1 )
in the formula t j At the time point of the jth test, α j Are respectively a mathematical model Y 0 (t) the jth coefficient, wherein:
β 0 ＝i 10 ,
…
i 1 [t 0 ,t 1 ,t 2 ,…,t j-2 ,t j-1 ,t j ]represents i 10 ,i 11 ,i 12 ,…,i 1j-2 ,i 1j-1 ,i 1j Is given by a differential correlation coefficient of (1), j ∈ [0,99]]An integer of (d);
step S23, according to the step S21 and the step S22, respectively, obtaining:
mathematical model Y for current waveform signal data of energy storage motor of non-fault state spring energy storage operating structure breaker 0 Correlation coefficient of (t):
α 0 ,α 1 ,α 2 ,…,α j-2 ,α j-1 ,α j
wherein alpha is j Are respectively a mathematical model Y 0 (t) the jth coefficient, j ∈ [0,99]]An integer of (a);
mathematical model Y for current waveform signal data of energy storage motor of spring energy storage operating structure breaker in state to be evaluated 1 Correlation coefficient of (t):
β 0 ,β 1 ,β 2 ,…,β j-2 ,β j-1 ,β j
wherein beta is j Are respectively a mathematical model Y 0 (t) the jth coefficient, j ∈ [0,99]]An integer of (d);
fault detection model for establishing spring energy storage operating structure breaker
Wherein, the first and the second end of the pipe are connected with each other,
And S3, inputting current waveform signals of the energy storage motor of the spring energy storage operating structure circuit breaker to be evaluated into a fault detection model of the spring energy storage operating structure circuit breaker, and evaluating to obtain a fault state.
In this embodiment, the step S3 specifically includes: according to the fault detection model M of the spring energy storage operating structure breaker obtained in the step S2
When M is more than 0.9 and less than or equal to 1, the breaker of the spring energy storage operating structure in the state to be evaluated is in a fault-free state;
when M is more than 0.8 and less than or equal to 0.9, the breaker of the spring energy storage operating structure in the state to be evaluated is in a slight fault state;
when M is more than 0.6 and less than or equal to 0.8, the breaker of the spring energy storage operating structure in the evaluation state to be tested is in a medium fault state;
and when the M is less than or equal to 0.6, the breaker of the spring energy storage operating structure in the state to be evaluated is in a serious fault state.
The above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (5)
1. A fault detection method for a spring energy storage operating structure circuit breaker is characterized by comprising the following steps:
s1, acquiring current waveform signals of a circuit breaker energy storage motor of a spring energy storage operating structure under different conditions;
s2, constructing a fault detection model of the breaker of the spring energy storage operating structure according to the obtained motor current waveform signal;
the step S2 specifically comprises the following steps:
s21, fitting data obtained by the breaker of the spring energy storage operating structure in the fault-free state by using a Newton interpolation method to obtain a mathematical model Y related to time t 0 (t) is as follows:
Y 0 (t)＝α 0 +α 1 (t-t 0 )+α 2 (t-t 0 )(t-t 1 )+α 3 (t-t 0 )(t-t 1 )(t-t 2 )+…+α j (t-t 0 )(t-t 1 )…(t-t j-1 )
in the formula t j At the time point of the jth test, α j For a mathematical model Y 0 (t) the jth coefficient, wherein:
α 0 ＝i 00 ,
…
s22, fitting data obtained by the breaker of the spring energy storage operating structure in the state to be evaluated by utilizing a Newton interpolation method to obtain a mathematical model Y related to time t 1 (t) the following:
Y 1 (t)＝β 0 +β 1 (t-t 0 )+β 2 (t-t 0 )(t-t 1 )+β 3 (t-t 0 )(t-t 1 )(t-t 2 )+…+β j (t-t 0 )(t-t 1 )…(t-t j-1 )
in the formula t j At the time point of the jth test, β j For a mathematical model Y 1 (t) the jth coefficient, wherein:
β 0 ＝i 10 ,
…
step S23, according to the step S21 and the step S22, respectively, obtaining:
current waveform signal data mathematical model Y of energy storage motor of circuit breaker of spring energy storage operating structure in fault-free state 0 Correlation coefficient of (t):
α 0 ,α 1 ,α 2 ,…,α j-2 ,α j-1 ,α j
wherein alpha is j As a mathematical model Y 0 (t) the jth coefficient, j ∈ [0,99]]An integer of (a);
mathematical model Y of current waveform signal data of energy storage motor of spring energy storage operating structure breaker under evaluation state to be detected 1 Correlation coefficient of (t):
β 0 ,β 1 ,β 2 ,…,β j-2 ,β j-1 ,β j
wherein beta is j For a mathematical model Y 1 (t) the jth coefficient, j ∈ [0,99]]An integer of (d);
establishing fault detection model of spring energy storage operating structure breaker
Wherein, the first and the second end of the pipe are connected with each other,
j is an integer belonging to [0,99 ];
and S3, inputting current waveform signals of the energy storage motor of the spring energy storage operating structure circuit breaker to be evaluated into a fault detection model of the spring energy storage operating structure circuit breaker, and evaluating to obtain a fault state.
2. The method for detecting the fault of the circuit breaker with the spring energy storage operating structure according to claim 1, wherein the different conditions comprise a no-fault state and a state to be evaluated.
3. The method for detecting the fault of the circuit breaker with the spring energy storage operating structure according to claim 2, wherein the step S1 specifically comprises:
step S11, installing a No. 1 interface, a No. 2 interface, a No. 1 probe wiring, a No. 2 probe wiring and a signal detection oscilloscope outside the energy storage motor of the spring energy storage operation structure circuit breaker, wherein the No. 1 interface is connected with the signal detection oscilloscope through the No. 1 probe wiring, the No. 2 interface is connected with the signal detection oscilloscope through the No. 2 probe wiring, and the signal detection oscilloscope obtains a current waveform signal of the energy storage motor of the spring energy storage operation structure circuit breaker through the No. 1 probe wiring and the No. 2 probe wiring;
and S12, connecting to obtain two current waveform signals of the energy storage motor in different states through the step S11, and sequentially extracting the two current waveform signals to obtain current waveform signals of the energy storage motor of the circuit breaker of the spring energy storage operation structure under different conditions.
4. The method for detecting the fault of the circuit breaker with the spring energy storage operating structure according to claim 3, wherein the step S12 is specifically as follows:
(1) Selecting a circuit breaker of the spring energy storage operating structure in a fault-free state as a reference circuit breaker, and performing a test at t 0 ～t 99 Selecting 100 equidistant test points in the time period, and recording the jth test time point as t j And are sequentially denoted as t 0 ,t 1 ,t 2 ,…，t 48 ,t 49 ,t 50 …t 97 ,t 98 ,t 99 Measuring the current value on the jth test point and recording the current value as i 0j In turn denoted as i 00 ,i 01 ,i 02 ,…,i 048 ,i 049 ,i 050 ,…,i 097 ,i 098 ,i 099 Obtain 100 groups (t) j ,i 0j ) Data, wherein t j Is [ t 0 ,t 99 ]Equidistant test points in a time interval, j ∈ [0,99]]An integer of (a);
(2) Selecting the breaker of the spring energy storage operation structure in the evaluation state to be tested as the breaker to be tested, and performing the test at t 0 ～t 99 Selecting 100 equidistant test points in the time period, and recording the jth test time point as t j And are sequentially denoted as t 0 ,t 1 ,t 2 …t 48 ,t 49 ,t 50 …t 97 ,t 98 ,t 99 Measuring the current value at the jth test point and recording the current value as i 1j In turn denoted as i 10 ,i 11 ,i 12 ,…,i 148 ,i 149 ,i 150 …i 197 ,i 198 ,i 199 Obtain 100 groups (t) j ,i 1j ) Data, where t j Is [ t 0 ,t 99 ]Equidistant test points in a time interval, j is E [0,99]]Is an integer of (1).
5. The method for detecting the fault of the circuit breaker with the spring energy storage operating structure according to claim 1, wherein the step S3 specifically comprises: according to the fault detection model M of the spring energy storage operating structure breaker obtained in the step S2
When M is more than 0.9 and less than or equal to 1, the breaker of the spring energy storage operating structure in the state to be evaluated is in a fault-free state;
when M is more than 0.8 and less than or equal to 0.9, the breaker of the spring energy storage operating structure in the state to be evaluated is in a slight fault state;
when M is more than 0.6 and less than or equal to 0.8, the breaker of the spring energy storage operating structure in the evaluation state to be tested is in a medium fault state;
and when the M is less than or equal to 0.6, the breaker of the spring energy storage operating structure in the state to be evaluated is in a serious fault state.
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